Process for purifying hydrogen halide solutions containing organic impurities
US-2025263296-A1 · Aug 21, 2025 · US
by active carbon · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C01B7/0725 |
| Official title | {by active carbon} |
| Display label | by active carbon |
| Total patents | 9 |
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 2 |
| 2025 | 1 |
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
US-2025263296-A1 · Aug 21, 2025 · US
US-10611635-B2 · Apr 7, 2020 · US
US-10576417-B2 · Mar 3, 2020 · US
US-2019134560-A1 · May 9, 2019 · US
US-10179735-B2 · Jan 15, 2019 · US
US-2018237298-A1 · Aug 23, 2018 · US
US-2018016141-A1 · Jan 18, 2018 · US
US-9828314-B2 · Nov 28, 2017 · US
US-2017158586-A1 · Jun 8, 2017 · US